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| 1 | Advanced prediction of tunnel boring machine performance based on big data显示文摘Predicting the performance of a tunneling boring machine is vitally important to avoid any possible accidents during tunneling boring.The prediction is not straightforward due to the uncertain geological conditions and the complex rock-machine interactions.Based on the big data obtained from the 72.1 km long tunnel in the Yin-Song Diversion Project in China,this study developed a machine learning model to predict the TBM performance in a real-time manner.The total thrust and the cutterhead torque during a stable period in a boring cycle was predicted in advance by using the machine-returned parameters in the rising period.A long short-term memory model was developed and its accuracy was evaluated.The results show that the variation in the total thrust and cutterhead torque with various geological conditions can be well reflected by the proposed model.This real-time predication shows superior performance than the classical theoretical model in which only a single value can be obtained based on the single measurement of the rock properties.To improve the accuracy of the model a filtering process was proposed.Results indicate that filtering the unnecessary parameters can enhance both the accuracy and the computational efficiency.Finally,the data deficiency was discussed by assuming a parameter was missing.It is found that the missing of a key parameter can significantly reduce the accuracy of the model,while the supplement of a parameter that highly-correlated with the missing one can improve the prediction. | Jinhui Li Pengxi Li Dong Guo Xu Li Zuyu Chen | 2021 | Geoscience Frontiers2021，12，1： | 17 |
| 2 | Precise timing of lacustrine gypsum in Luobubo,Xinjiang using the thermal ionization mass spectrometry U-series method显示文摘Dating techniques including gypsum dissolution in water, iron hydroxide co-precipitation with uranium and thorium and mass spectrometric determination have been investigated in this note. The ages of the gypsum samples in a CK core from Luobubo lacustrine sediments are in the range of (12.85±0.21) kaBP (4 m distance from the top core) to (153.2 ± 7.2) kaBP (49 m distance from the top core) with the relative errors of ( 1.6%-±4.7%. It indicates that the sedimental environment of the CK core was situated in the middle-late Pleistocene and Holocene periods, corresponding to 1-6 stages of oxygen isotopes in the abyssal sediments and included much information from last inter-glacial to Holocene warm periods. | PENG Zicheng LIU Weiguo ZHANG Pengxi ZHANG Zhaofeng ZHOU Jie | 2001 | Chinese Science Bulletin2001，46，18： | 10 |
| 3 | Effect of Copper Toxicity on Lymphoid Organs in Broilers显示文摘The experiment was conducted to examine the effect of copper toxicity on lymphoid organs by experimental pathology andflow cytometry (FCM). 180 one-day-old Avian broilers were divided into three groups, and fed diets as follows: 1) Control(Cu 11.97 mg kg-1 diet), 2) Cu- toxic groupⅠ(Cu 650 mg kg-1) and 3) Cu- toxic groupⅡ(Cu 850 mg kg-1) for six weeks.Compared with the control, the growth index of the thymus, spleen and bursa of Fabricius were markedly reduced (P<0.05or P<0.01), the G0/G1 phase of cell cycles of the thymus, spleen and bursa of Fabricius was higher (P<0.05 or P<0.01), whilethe S phase and proliferating index were lower (P<0.05 or P<0.01) in both Cu-toxic group Ⅰ and Cu-toxic group Ⅱ. Theresults demonstrated that Cu toxicity seriously impaired the progression of lymphocytes from the G0/G1 phase to the Sphase, inhibited the growth and development of lymphoid organs. | CUIHeng-min YANGGuang PENGXi DENGJun-liang LIDe-bing | 2005 | Agricultural Sciences in China2005，4，3： | 2 |
| 4 | Effect of Zinc Toxicity on Lymphoid Organs in Chickens显示文摘The experiment was conducted with the objective of studies on effects of zinc toxicity on lymphoid organs by the methods of experimental pathology and flow cytometry (FCM). 200 one-day-old Avian broilers were divided into four groups randomly, and fed on diets as follows: controls (Zn 100 mg kg-1)and zinc toxic (Zn 1 500 mg kg-1, zinc toxic group Ⅰ; Zn 2 000 mg kg-1, zinc toxic groupⅡ; Zn 2 500 mg kg-1, zinc toxic group Ⅲ) for seven weeks. The weight and growth index of the thymus, spleen and bursa of Fabricius were reduced in both zinc toxic groupⅡand zinc toxic group Ⅲ when compared with those of control group. The G0/G1 phase of the cell cycles of the lymphoid organs was higher, and S, G2+M phases lower in zinc toxic groups Ⅱand Ⅲ than in control group. Lymphocytes were depleted and degenerate in the lymphoid organs. The reticular cells of the bursa of Fabricius proliferated and the reticular cells of the thymus were also degenerate and necrotic, particularly in zinc toxic groups Ⅱand Ⅲ. The results demonstrated that more than 1 500 mg kg-1 impaired the progression of lymphocytes from the G0/Gl phase to S phase obviously, inhibited the development of lymphoid organs and caused marked pathological changes in the lymphoid organs. Potential mechanisms underlying these observations are also discussed. | CUIHeng-min ZHAOCui-yan LIDe-bing PENGXi DENGJun-liang | 2004 | Agricultural Sciences in China2004，3，10： | 2 |
| 5 | Effect of Copper Toxicity on Lymphoid Organs in Ducklings显示文摘one-day-old Tianfu meat ducklings were divided into three groups, and fed on dietsas follows:(1)control (Cu 12.16 mg kg-1),(2) copper toxicⅠ(Cu 850 mg kg-1) and (3)copper toxicⅡ( Cu 1050 mg kg-1) for studies on effects of copper toxicity on lymphoidorgans in duckling with the methods of experimental pathology and flow cytometry (FCM).The weight and growth index of the thymus, spleen and bursa of Fabricius were markedlyreduced (P<0.05 or P<0.01) in both copper toxic groupⅠand Cu toxic group Ⅱ whencompared with control group. The G0/G1 phase of the cell cycle of the thymus, spleen andbursa of Fabricius was much higher, and S, G2+M phases lower in Cu toxic groupsⅠand Ⅱthan in the control group. There were lymphocyte degeneration and depletion of lymphoidorgans, and the reticular cells of spleen and bursa of Fabricius proliferated and thereticular cells of thymus were also degenerate and necrotic in Cu toxic groups. Theresults demonstrated that Cu toxicity seriously impaired the progression of lymphocytesfrom the G0/G1 phase to S phase, inhibited the development of lymphoid organs and causedmarked pathological injury in lymphoid organs. The results also showed that the effectof Cu toxicity on the primary lymphoid organs occurred stronger than on the secondarylymphoid organs. The effect of Cu toxicity was the greatest on the bursa of Fabricius,followed by the thymus, and then the spleen. Potential mechanisms underlying aforementionedobservation were also discussed. | CUIHeng-min CHENHuai-tao PENGXi YANGGuang DENGJun-liang LIDe-bing | 2004 | Agricultural Sciences in China2004，3，3： | 2 |
| 6 | Second-orderoptimalityconditionsinset-valuedoptimizationproblems[J]显示文摘 | WangXY ZhuSK PengXY | | 四川大学学报:自然科学版0，，： | 2 |
| 7 | Arabidopsis EXTRA-LARGE G PROTEIN 1(XLG1) functions together with XLG2 and XLG3 in PAMP-triggered MAPK activation and immunity显示文摘Pattern-triggered immunity(PTI) is an essential strategy used by plants to deploy broad-spectrum resistance against pathogen attacks. Heterotrimeric G proteins have been reported to contribute to PTI.Of the three non-canonical EXTRA-LARGE G PROTEINs(XLGs) in Arabidopsis thaliana, XLG2 and XLG3 were shown to positively regulate immunity,but XLG1 was not considered to function in defense,based on the analysis of a weak xlg1 allele.In this study, we characterized the xlg1 xlg2 xlg3 triple knockout mutants generated from an xlg1 knockout allele. The strong xlg1 xlg2 xlg3 triple mutants compromised pathogen-associated molecular pattern(PAMP)-triggered activation of mitogen-activated protein kinases(MAPKs) and resistance to pathogen infection. The three XLGs interacted with MAPK cascade proteins involved in defense signaling, including the MAPK kinase kinases MAPKKK3 and MAPKKK5, the MAPK kinases MKK4 and MKK5, and the MAPKs MPK3 and MPK6. Expressing a constitutively active form of MKK4 restored MAPK activation and partially recovered the compromised disease resistance seen in the strong xlg1 xlg2 xlg3 triple mutant. Furthermore, mutations of all three XLGs largely restored the phenotype of the autoimmunity mutant bak1-interacting receptor-like kinase 1. Our study reveals that all three XLGs function redundantly in PAMP-triggered MAPK activation and plant immunity. | Yiping Wang Hailei Zhang Pengxi Wang Huan Zhong Wuzhen Liu Shoudong Zhang Liming Xiong Yingying Wu Yiji Xia | 2023 | Journal of Integrative Plant Biology2023，65，3： | 1 |
| 8 | Chemical and boron isotope compositions of non-marine brines from the Qaidam Basin, Qinghai, China显示文摘 | Vengosh A Chivas A R Starinsky A Kolodny Y Zhang Baozhen Zhang Pengxi | 1995 | Cheml Geol1995，120，12： | 1 |
| 9 | Postharvest temperature influences volatile lactone production via regulation of acyl‐CoA oxidases in peach fruit显示文摘 | WAN‐PENGXI BOZHANG LILIANG JI‐YUANSHEN WEN‐WENWEI CHANG‐JIEXU ANDREW C.ALLAN IAN B.FERGUSON KUN‐SONGCHEN | 2012 | Plant Cell & Environment2012，，3： | 1 |
| 10 | Species, valve size, and pretreatment effects on δ 18 O and δ 13 C values of ostracod valves from Lake Qinghai, Qinghai–Tibet Plateau显示文摘 | Xiangzhong Li Weiguo Liu Pengxi Zhang Zhisheng An Ling Zhang | 2007 | Chemical Geology2007，，1： | 1 |
| 11 | Distribution of hydrogen and Oxygen Isotopes in Salt Lakes of the Qinghai -- Xizang Plateau, China 显示文摘 | ZHANG Baozhen ZHANG Pengxi | 1990 | Chi- nese Journal of Geochmistry1990，19，4： | 1 |
| 12 | Chemical and boron isotope compositions of non-marine brines from the Qaidam Basin, Qinghai, China显示文摘 | A. Vengosh A.R. Chivas A. Starinsky Y. Kolodny Zhang Baozhen Zhang Pengxi | 1995 | Chemical Geology1995，，1： | 1 |
| 13 | Risk factors for diabetic retinopathy in a rural Chinese population with type 2 diabetes:the Handan Eye Study显示文摘 | Wang FH LiangYB PengXY | 2011 | Acta Ophthalmol2011，89，4： | 1 |
| 14 | Antibodies to the GABAB receptor in limbic encephalitis with seizures:case series and characterisation of the antigen显示文摘 | Petit PM Armangue T Pengxy ST | 2014 | Lancet Neurology2014，13，： | 1 |
| 15 | LITHIUM RESOURCES IN CHINA'S SALT LAKES & ITS SUSTAINABLE DEVELOPMENT显示文摘This article gives an introductory exposition of the growing demands of lithium on the market against the background of current rapid S&Tprogress and booming economic development, the worldwide trend in the production of lithium salts and the rich lithium reserves in China’s salt lakes as well as the brilliant prospects for its exploitation in the future. The article proposes that a sustainable exploitation of the lithium trove from these salt lakes should be rooted in comprehensive utilization of the trove and take a long-term approach, emphasizing high value proliferation in developing quality lithium-based products. Also, it expresses some tentative ideas on building demonstration bases for all-round exploitation and utilization of the salt lake resources and the development of lithium cells. | Ma Peihua & Zhang Pengxi(Qinghai Institute of Salt Lakes, CAS) | 1999 | Bulletin of the Chinese Academy of Sciences1999，13，4： | 0 |
| 16 | Achieving near-infrared-light-mediated switchable friction regulation on MXene-based double network hydrogels显示文摘MXene possesses great potential in enriching the functionalities of hydrogels due to its unique metallic conductivity,high aspect ratio,near-infrared light(NIR light)responsiveness,and wide tunability,however,the poor compatibility of MXene with hydrogels limits further applications.In this work,we report a uniformly dispersed MXene-functionalized poly-N-isopropylacrylamide(PNIPAM)/poly-2-acrylamido-2-methyl-1-propanesulfonic acid(PAMPS)double network hydrogel(M–DN hydrogel)that can achieve switchable friction regulation by using the NIR light.The dispersity of MXene in hydrogels was significantly improved by incorporating the chitosan(CS)polymer.This M–DN hydrogel showed much low coefficient of friction(COF)at 25℃ due to the presence of hydration layer on hydrogel surface.After illuminating with the NIR light,M–DN hydrogel with good photothermal effect rapidly raised the temperature to above the lower critical solution temperature(LCST),which led to an obvious increase of surface COF owing to the destruction of the hydration layer.In addition,M–DN friction control hydrogel showed good recyclability and controllability by tuning“on-off”of the NIR light.This work highlights the construction of functional MXene hydrogels for intelligent lubrication,which provides insight for interface sensing,controlled transmission,and flexible robotic arms. | Pengxi WU Cheng ZENG Jinglun GUO Guoqiang LIU Feng ZHOU Weimin LIU | 2024 | Friction2024，12，1： | 0 |
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